Door latch



April 5, 1932. F. D. GRUND. 1,852,009

DOOR LATCH Filed Oct. 20. 1930 l i'i Patented Apr. 1932 v um'rso STATES PATENT OFFICE FLETCHER ID. GBUHD, OI WESTON, OBI IO, LSSIGII'OR 1'0 mom SWISS OOI- rm, TOLEDO, OHIO, A. CORPORATION O! OHIO noon m'ron Original application fled January 5, 1989, Serial Io. 380,587. Divided and this application fled October 20, 1830. Serial 110. 489,728.

This invention relates to door latches, but more particularly to door latches generally used on vehicles, such as automobiles, and an object is to produce a sim 1e and eficient door a latch. having the new an improved. features of construction, arrangement and operation hereinafter described.

The invention is shown by way of illustration, but not of limitation in the accompanyto ing drawing, in which The figure is a side elevation of a door latch, a portion of the remote control strap being shown, but theremote control handle mechanism being omitted.

This application constitutes a division of my 00- ending application Serial No. 330 537 filed anuary 5th, 1929, and entitled oor fastener.

a The illustrated embodiment of the invention comprises a door latch having a case plate 57 from which a latch bolt 58 projects. This bolt is formed with a shoulder 59 which is engageable by a spring 60 to hold the bolt normally in projected position. A slide 61 is secured to the bolt 58 and is formed with a shoulder 62 adapted to be enga ed by a projection 63 on the roll-back mein er 6%. This roll-back member has a rearwardly and downwardly projecting finger 65 which is engageable by the end of a do 66 to lock the rollback member with the olt projected. The dog is pivoted on a pin 67 and projects through a keeper 68 to engage the end of the finger 65. Aspring 69 mounted on the pin 67 is adapted to enga e a flange 7 Q at the rear end of the dog to roc the latter out of locking position. Aremote control member 71 is connected to the slide 61 by a pin 7 2 which passes through a slot 73, thereby providing a lost motion connection. When the member 71 is advanced beyond bolt releasing position a nose 7% at its front end engages the finger to rock the dog to locking position. The slide 61 is guided on the outer face of the keeper 68 bya pin 75 which extends through a slot 76 in the slide.- It will be noted that when the dog is in locking position and pressure is exerted to rock the roll-back member to retract the bolt, the ends of the finger 65 and the dog 66 have a toggle engagement which prevents the actuation of the bolt, since the movement of the dog is limited by the upper edge of the keeper 68. When the member 71 is withdrawn the dog 66 is adapted to be swung by the spring 69 to the lower end of the keeper 68 and out of engagement with the finger 65. The abutting ends of the finger 65 and the dog 66ers inclined so that one has a cam action on the other. If desired, the inclination of these abutting ends may be such that, when the member 71 is withdrawn from dog actuating position, the retractive movement of the roll-back member 64: will throw the dog to non-locking position without the 4 back member, a keeper through which the dog projects. and which limits the movement of the dog in either direction about its pivot,

means for moving the dog in one direction into position to lock the'roll-back member, and means for movin the do in the opposite direction to unloc ing pos1tion when the setting means is withdrawn. 0

2. In a door fastener, the combination of a case plate, a latch bolt slidably mounted thereon, a roll-back member for retracting said bolt, a pivoted dog for locking said rollback member, said dog and said roll-back member having projecting ends which meet to constitute a toggle action when the dog is in looking position, a keeper for said dog positively limiting its movement in either direction, means on said keeper for guiding said latch bolt in its slidable movement, and means for positively setting the dog in looking position.

3. A door latch comprising a back plate, a tensioned latch bolt movable over said back plate in a plane parallel thereto, an outside operated rollback for retracting said latch bolt having a downward and rearwardl extending arm, a lever pivoted to said atch late and engageable with said am, a link having lost motion connection with said latch bolt and engageable with said lever upon s1 1p plementary reverse movement of said hnk for moving said lever into engagement with said roll back arm, thereby to provide a to m glefor 1preventing operation of said roll bac and a eeper on sald back plate projecting outwardl therefrom, said keeper provi a guide orsaid lever, and said latch bolt lbearing against the outer surface of said ee r. E A door latch comprising a back plate, a tensioned latch bolt movable over said back late, a roll back for retractingl said latch olt having an arm projecting t erefrom, a 20 tensioned bell crank lever p1voted to said back late and en ageable with said arm provi ing a toggle t ereby to prevent actuation of said roll back, a keeper integral with said back plate and projecting outwardly therefrom adapted to limit the movement of said tensioned lever and a retracting link having a l ostmotion connection with said bolt engageable with said tensioned lever for actuao atin the latter into engagement with said roll ack arm.

5. A door latch comprising a back plate and a tensioned latch bolt, a roll back for retracting said bolt having a downwardl and rearwardly extending arm, a longitudinally movable link having lost motion connection with said bolt and adapted to retract the same, a lever pivoted to said back plate, -and having one end portion thereof disposed in' the path of movement of said link when movement in a non-bolt retracting direction is imparted to the latter, the opposite end of said lever being engageable with said arm to form a toggle, thereby to prevent movement of said roll back, spring means for holding said lever in normal position, and a keeper .extruded from said back plate providing a guide for said lever and adapted to space said bolt from said back plate. r

In testimony whereof I have hereunto signed my name to this'specification.

FLETCHER D. GRUND. 

